function validataLogin()
{
	alert("校验开始");
	var username = document.getElementById("username").value;
	var password = document.getElementById("password").value;
	if(username!=null && username!="" && password !=null && password!="")
	{
		alert(username+"，航通ITS欢迎您！");
		 document.forms[0].action = "testConn.action";
		 document.forms[0].submit();
	}else
	{
		alert("用户名和密码不能为空");
		 document.forms[0].action ="";
	}
		
}